Types of computer:-
Mainly computers are divided into 4 types according to there function & capacity.
- Super Computer
- Mainframe Computer
- Mini Computer
- Micro Computer
1)) Super Computer :-
{ CRAY Research: CRAY - 1 & CRAY - 2, Fujitsu (VP 2000), Hitachi (S820), NEC (SX 20), PARAM 10000 by C-DAC, Anupam by BARC, PACE series by DRDO }
- Most powerful computer system - needs a large room.
- Minimum world length is 64 bits.
- CPU speed : 100 MIPS.
- Equivalent to 4000 computers.
- High cost : 4 - 5 millions.
- Able to handle large no. of data.
- High power consumption.
- High precision.
- Large & fast memory ( Primary & Secondary )
- Uses multiprocessing & parallel processing
- supports multi programming.
Applications :-
- In petroleum industry - to analyze volumes of seismic data which are gathered during oil seeking explorations to identify areas where there is possibility of getting petroleum products inside the earth.
- In aerospace industry - to simulate airflow around an aircraft at different speeds & altitude. This helps in producing an effective aerodynamic design for superior performance.
- meteorological centers use super computer for weather forecasting.
- For weapons research & development, sending rockets to space etc.
- In automobile industry - to do crash simulation of the design of an automobile before it is released for manufacturing - for better automobile design.
- In biomedical research - atomic nuclear & plasma analysis to study the structure of viruses.
2)) Mainframe Computer :-
{ IBM 3000 series, Burroughs B7900, Univac 1180, DEC }
- Able to process large amount of data at very high speed.
- Supports multi user facility.
- Number of processors varies from one to six.
- Cost : reached some million.
- Kept in air conditioned room to keep them cool.
- Supports many I / O & auxiliary storage devices.
- Used to manage large centralized database.
- Used to process large amount of data at very high speed used in Banks / Railways / Insurance companies / Hospitals.
- Used as controlling nodes in WANs.
3)) Mini computers :-
{ Digital Equipment PDP 11 / 45 & VAX 11 }
- Designed to support more than one user at a time.
- Support faster peripheral devices like high speed printers.
- Can also communicate with Mainframes.
- Perform better than Micros.
- Large in size & costlier than micros.
- Posses large storage Capacities & operates at higher speed.
- Used to control & monitor production process.
- These computers are used when the volume of processing is large.
- To analyze results of experiments in laboratories.
- Used as servers in LANs.
4)) Micro Computers :-
{ IBM PC, PS / 2 & Apple Machintosh }
- Micro computers are designed to be used by only one person at a time.
- Small to medium data storage capacities.
- A Micro computer uses a micro processor as it's central processing unit
- Micro computers are tiny computers that can vary in size from a single chip to the size of a desktop model.
- Used in the field of Desktop Publishing (DTP), Accounting, Statistical analysis, Graphic Designing, Investment analysis, Project Management, Teaching, Entertainment etc.
- Different models of Microcomputers are
- Personal Computers
- Note Book / Lap Top
- Palm Top
- Wrist PC.
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